US6947476B2 - Method for synchronizing frame by using pilot pattern in compressed mode - Google Patents
Method for synchronizing frame by using pilot pattern in compressed mode Download PDFInfo
- Publication number
- US6947476B2 US6947476B2 US09/783,041 US78304101A US6947476B2 US 6947476 B2 US6947476 B2 US 6947476B2 US 78304101 A US78304101 A US 78304101A US 6947476 B2 US6947476 B2 US 6947476B2
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- Prior art keywords
- frame synchronization
- pilot bit
- pilot
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- 238000005311 autocorrelation function Methods 0.000 claims description 8
- 238000005314 correlation function Methods 0.000 claims description 8
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- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 238000010295 mobile communication Methods 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 description 21
- 238000010586 diagram Methods 0.000 description 10
- 108010003272 Hyaluronate lyase Proteins 0.000 description 5
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- 230000009467 reduction Effects 0.000 description 3
- NUOYJPPISCCYDH-BYPYZUCNSA-N (2s)-1-(2,2,2-trifluoroacetyl)pyrrolidine-2-carbonyl chloride Chemical compound FC(F)(F)C(=O)N1CCC[C@H]1C(Cl)=O NUOYJPPISCCYDH-BYPYZUCNSA-N 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 239000010754 BS 2869 Class F Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
- H04W56/007—Open loop measurement
- H04W56/0075—Open loop measurement based on arrival time vs. expected arrival time
- H04W56/0085—Open loop measurement based on arrival time vs. expected arrival time detecting a given structure in the signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2662—Arrangements for Wireless System Synchronisation
- H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
- H04B7/2678—Time synchronisation
Definitions
- the present invention relates to a method for synchronizing frames by using pilot patterns in a compressed mode.
- a DPCH Dedicated Physical Channel
- the DPCH consists of hierarchal layers of super frames, radio frames, and time slots.
- DPDCH Dedicated Physical Data Channel
- DPCCH Dedicated Physical Control Channel
- the DPDCH is for transportation of dedicated data
- the DPCCH is for transportation of control information.
- the DPCCH has a plurality fields, such as a pilot, a TFCI, an FBI, and a TPC.
- the pilot N pilot is provided with pilot bits (or symbols) for supporting channel estimation for making coherent detection, and pilot bits (or symbols) for frame synchronization. Particularly, it is very important to make, identify, and failure detection of frame synchronization by using pilot patterns of the pilot N pilot , at a receiver side of the next generation mobile communication system.
- the following table 1 shows frame synchronization words used in the up link and down link DPCH.
- the R im ( ⁇ ) in the equation (1) is an auto-correlation function of a frame synchronization word C i .
- FIG. 2B illustrates a graph showing a cross-correlation result between
- the frame synchronization is attained, and identified by using correlation of the frame synchronization words shown in table 1.
- a performance of attaining the frame synchronization can be made properly when 15 slots are transported for one frame, the performance can not be made properly when a minimum 8 slots and maximum 14 slots are transported for one frame like in a compressed mode which is a character of a W-CDMA.
- correlation of pilot patterns are made for identification of frame synchronization and detection of the out-of frame synchronization.
- the threshold values in the related art set freely as the mobile station UE or the base station Node B likes causes failure in the frame synchronization identification or out-of frame synchronization detection owing to different threshold values, that may be one of great problem in global roaming the next generation mobile communication system pursues. Accordingly, a universal reference for determining the frame synchronization identification and the out-of frame synchronization detection is required, and a method for making positive frame synchronization identification and detection of out-of frame synchronization is required.
- An object of the present invention is to provide a method for synchronizing frames by using pilot patterns in a compressed mode, which can achieve a perfect synchronization even in a case a W-CDMA mobile communication system is in the compression mode.
- Another object of the present invention is to provide a method for synchronizing frames by using pilot patterns in a compressed mode, which can provide a reference for identification of the frame synchronization or detection of the out-of frame synchronization.
- frame synchronization words are restored in frame perfectly by using dedicated pilot patterns.
- the frame synchronization is achieved by using correlation of the restored frame synchronization words.
- frame synchronization words to be transmitted over one frame from a transmission side are punctured as many as desired number of slots.
- the frame synchronization words are restored in frames by using correlation of the received series of codes.
- Frame synchronization is attained with respect to a channel by using correlation of the restored frame synchronization words.
- the restored frame synchronization words which are pilot bit sequences, are auto-correlated and cross correlated. The auto-correlation result and the cross correlation result are negatively summed, and compared to a preset threshold value ⁇ . A frame synchronization success for the received channel is determined according to a result of the comparison, and reported to an upper layer.
- the restored frame synchronization words are classed into a number of classes corresponding to frame synchronization word pairs, and one word of the frame synchronization word pair in one class is the other word being cyclic shifted by 7 bits and inverted.
- the threshold value ⁇ is set to a value equal to ‘0’ or greater than ‘0’ depending on an SNR ratio.
- FIG. 3 illustrates a structure of an uplink DPCH of 3GPP RAN standard
- FIG. 4 illustrates a structure of a downlink DPCH of 3GPP RAN standard
- FIG. 5 explains an STTD encoding principle in downlink DPCH of 3GPP RAN standard
- FIG. 6 illustrates a block diagram of a device for restoring a pilot pattern used for frame synchronization in a compressed mode of the present invention
- FIG. 8 illustrates a block diagram of a cross correlation device for frame synchronization in accordance with a preferred embodiment of the present invention
- FIG. 10 illustrates a block diagram of a system of correlators for identification of frame synchronization and detection of out of frame synchronization in accordance with a preferred embodiment of the present invention.
- FIG. 3 illustrates a structure of an uplink DPCH of 3GPP RAN standard.
- the following table 2 shows information on each field of an uplink DPDCH, and the next table 3 shows information on each field of a downlink DPDCH.
- the codes C1, C2, C3, and C4 form code pairs in classes E and F.
- an uplink DPCH Npilot 3
- a relation of C1 and C2 for respective bit# can be known from the following table 7.
- Ci,j represents a (j)th slot bit of a pilot bit pattern Ci.
- the present invention facilitates to know information on not transmitted slots in the compressed mode by using respective code relations of the pilot bit patterns, and particularly, pilot bit patterns can be restored in frames for the frame synchronization.
- the DPCH may or may not have the TFCI.
- a slot format that is different from one in a general mode is used in the compressed mode. That is, there are two more modes having separate indices added thereto as shown in table 9 in the compressed mode, wherein an ‘A’ type slot format is used as a transmission time reduction method, and a ‘B’ type slot format is used as a spreading factor reduction method.
- the slot format #3 is for field information in a general mode
- slot formats #3A and #3B are for field information in the compressed mode.
- a number of slots transmissive per a frame in the general mode are 15, and minimum 8 in the compressed mode. In other words, at least 8 slot information is transmitted even in the compressed mode.
- the Ci,j in table 12 which corresponds to Table 12 on page 33-22 of Korean Patent Application No. 7328/2000, represents a (j) th symbol of a pilot symbol pattern Ci.
- the present invention facilitates to know information on not transmitted slots in the mode by using relations of such downlink pilot symbol pattern codes, and particularly, to restore the pilot symbol patterns in frames for frame synchronization.
- the (15 ⁇ ) not transmitted information bits of the pilot bit patterns C1, C3, C5, C7 are restored by the equation (7), and the not transmitted information bits of the pilot bit patterns C2, C4, C6, and C8 are restored by the equation (8).
- the following table 13 shows pilot symbol patterns of the pilot symbol patterns shown in table 10 having an STTD(Space Time Transmit Diversity) taken into account.
- the pilot symbol patterns in the table 13 are produced by an STTD encoding of which principle is shown in FIG. 5 .
- Relations of mapping of the columnar sequences in table 13 and the frame synchronization words in table 1 are shown in the following table 14.
- the frames punctured, and transmitted in the compressed mode have a noise component added thereto, to be expressed as follows. ⁇ 1 (t)P(t), ⁇ 2 (t)P(t), ⁇ 3 (t)P(t), - - - , ⁇ 8 (t) P(t) (11)
- FIG. 7 illustrates a block diagram of an auto-correlation device for frame synchronization in accordance with a preferred embodiment of the present invention
- FIG. 8 illustrates a block diagram of a cross correlation device for frame synchronization in accordance with a preferred embodiment of the present invention, wherein T frame represents one frame period, which is 10 msec in the present 3GPP standard.
- the present invention facilitates to attain and identify frame synchronization of the uplink and downlink DPCH even in a compressed mode by using method and device the same with a general mode, and can also realize detection of out-of synchronization.
- the receiver side After comparing an output of the correlator over the frame time period given from the network through an upper layer to a specific threshold voltage, the receiver side reports success or failure of the frame synchronization to the upper layer.
- FIG. 9 illustrates a structure of SCCPCH(Secondary Common Control Physical Channel) of 3GPP RAN standard.
- the SCCPCH is used for transmission of FACH(Forward Access Channel) and a paging channel.
- the following table 15 shows field information on the SCCPCH.
- the slots with 8 bit or 16 bit pilot symbols N pilot in the table 10 represent pilot symbol patterns of the SCCPCH having the present invention applied thereto.
- the downlink pilot patterns shown in table 10 shadowed parts among the whole pilot symbols are used for frame synchronization, and a pilot symbol except the parts has a value ‘1’.
- the columnar sequences with all symbol value ‘1’ are used for channel estimation for coherent detection.
- the table 13 shows pilot symbol patterns in the table 10 having STTD taken into account.
- the pilot symbol patterns in the table 13 are produced by subjecting the SCCPCH symbols to STTD encoding as shown in FIG. 5 when there is a diversity antenna on the network side or the SCCPCH is transmitted by using an open loop transmit diversity.
- FIG. 7 illustrates a block diagram of an auto-correlation device for frame synchronization identification and out-of frame synchronization detection in accordance with a preferred embodiment of the present invention, wherein the frame synchronization is identified in frames by using an auto-correlation result in forms as shown in FIGS.
- FIG. 8 illustrates a block diagram of a cross correlation device for frame synchronization identification and out-of frame synchronization detection in accordance with a preferred embodiment of the present invention, for frame synchronization identification by using the cross correlation result in forms shown in FIGS. 1B or 2 B, when an output the cross correlator is compared to a present negative ‘ ⁇ ’ threshold value for the frame synchronization identification.
- T frame represents one frame time period, which is 10 msec in the present 3GPP standard.
- the present invention combines outputs of the auto-correlator in FIG. 7 and the cross-correlator in FIG. 8 for the frame synchronization identification and the out-of frame synchronization detection.
- the present invention determines a success in the frame synchronization identification by using the parameter ‘Z’ shown in the following equation 13.
- the equation (13) has a prerequisite that there is no distortion of the radio channel, and the parameter ‘Z’ is a reference for determining success of the frame synchronization identification.
- the threshold value ⁇ is set up to be flexible according to an SNR(Signal to Noise Ratio). If the present SNR is high, the threshold value ⁇ is set to be higher, and if the present SNR is lower, the threshold value ⁇ is set to be lower.
- FIG. 10 illustrates a block diagram of a system of correlators for identification of frame synchronization and detection of out-of frame synchronization in accordance with a preferred embodiment of the present invention, referring to which a system of the correlators of the present invention will be explained in detail.
- a first correlator 1 and a second correlator 2 take auto correlation of received frame synchronization words
- a third correlator 3 and a fourth correlator 4 take cross correlation of received frame synchronization words.
- the auto-correlation result is delayed for certain slot time periods during the cross correlation is carried out. Then, the auto-correlation result and the cross correlation result are negative summed.
- restored frame synchronization words are classed into a number of classes corresponding to pairs of the frame synchronization words. Then, a first frame synchronization word and the second frame synchronization word of each class, i.e., each code pair, are auto-correlated, to produce a first auto-correlation result and a second auto-correlation result. Then, the first auto-correlation result and the second auto-correlation result are summed to produce a final auto-correlation result.
- a step of carrying out a cross correlation at first restored frame synchronization words are classed into a number of classes corresponding to pairs of the frame synchronization words. Then, a second frame synchronization word is cross correlated with respect to a first frame synchronization word, to obtain a first cross correlation result, and the first frame synchronization word is cross correlated with respect to the second frame synchronization word, to obtain a second cross correlation result delayed for a time period compared the first cross correlation result. Then, the first cross correlation result and the second cross correlation result are summed, to obtain a final cross correlation result.
- the method for synchronizing frames by using pilot patterns in a compressed mode of the present invention has the following advantages.
- the present invention permits to restore perfect frame synchronization words in frames by using dedicated pilot pattern.
- the frame synchronization can be achieved by using device and method the same with a general mode.
- the appropriate combination of the auto-correlation function and the cross correlation function of the pilot patterns permits easy identification of the frame synchronization or easy out-of frame synchronization detection, that allows fast synchronization of successive frames.
- the application of more reliable correlation outputs in identification of the frame synchronization or out-of frame synchronization detection to all the next generation mobile communication systems using the pilot patterns of the present invention provides the same reference for all systems that use the same pilot patterns.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Television Systems (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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KR1020000007328A KR100720570B1 (ko) | 2000-02-16 | 2000-02-16 | 이동 통신 시스템에서의 프레임 동기 방법 및 압축 모드 지원 방법 |
KR2000/7328 | 2000-02-16 | ||
KR1020000007602A KR100720542B1 (ko) | 2000-02-17 | 2000-02-17 | 이동 통신 단말에서 프레임 동기의 성공 여부를 검출하는 방법 |
Publications (2)
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US20010021236A1 US20010021236A1 (en) | 2001-09-13 |
US6947476B2 true US6947476B2 (en) | 2005-09-20 |
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US09/783,041 Expired - Fee Related US6947476B2 (en) | 2000-02-16 | 2001-02-15 | Method for synchronizing frame by using pilot pattern in compressed mode |
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Country | Link |
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US (1) | US6947476B2 (zh) |
EP (1) | EP1126637B8 (zh) |
JP (1) | JP3479513B2 (zh) |
CN (1) | CN1231002C (zh) |
AT (1) | ATE510368T1 (zh) |
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US20040032841A1 (en) * | 2002-08-13 | 2004-02-19 | Alcatel | Method and devices for operating a radio-based telecommunications system |
US20040101046A1 (en) * | 2000-08-25 | 2004-05-27 | Lin Yang | Terrestrial digital multimedia/television broadcasting system |
US20050190728A1 (en) * | 2004-02-14 | 2005-09-01 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting control information in a mobile communication system |
US20050286465A1 (en) * | 2004-06-24 | 2005-12-29 | Xiangyang Zhuang | Method and apparatus for accessing a wireless communication system |
US20050286408A1 (en) * | 2004-06-25 | 2005-12-29 | Lg Electronics Inc. | Allocation of radio resource in orthogonal frequency division multiplexing system |
US20060280266A1 (en) * | 2001-05-21 | 2006-12-14 | At&T Corp. | Optimum training sequences for wireless systems |
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US20090086700A1 (en) * | 2003-10-02 | 2009-04-02 | Qualcomm Incorporated | Systems and methods for communicating control data using multiple slot formats |
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US9246646B2 (en) | 2010-10-01 | 2016-01-26 | Interdigital Patent Holdings, Inc. | Method and apparatus for transmitting pilot on multiple antennas |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5844907A (en) * | 1995-11-28 | 1998-12-01 | Mitsubishi Denki Kabushiki Kaisha | Synchronization determining circuit, demodulator and communication system |
EP0905941A1 (en) | 1997-02-13 | 1999-03-31 | Ntt Mobile Communications Network Inc. | Frame synchronizing circuit |
US5991330A (en) | 1997-06-27 | 1999-11-23 | Telefonaktiebolaget L M Ericsson (Pub1) | Mobile Station synchronization within a spread spectrum communication systems |
US6084865A (en) * | 1995-07-12 | 2000-07-04 | Ericsson Inc. | Dual mode satellite/cellular terminal |
US6118825A (en) * | 1997-08-11 | 2000-09-12 | Sony Corporation | Digital data transmission device and method, digital data demodulation device and method, and transmission medium |
US6549544B1 (en) * | 1999-11-10 | 2003-04-15 | Ibiquity Digital Corporation | Method and apparatus for transmission and reception of FM in-band on-channel digital audio broadcasting |
US6618367B1 (en) * | 1999-12-16 | 2003-09-09 | Agere Systems Inc. | Transmission frame structure for a satellite digital audio radio system |
-
2001
- 2001-02-09 AT AT01103089T patent/ATE510368T1/de not_active IP Right Cessation
- 2001-02-09 EP EP20010103089 patent/EP1126637B8/en not_active Expired - Lifetime
- 2001-02-15 JP JP2001039254A patent/JP3479513B2/ja not_active Expired - Fee Related
- 2001-02-15 US US09/783,041 patent/US6947476B2/en not_active Expired - Fee Related
- 2001-02-16 CN CNB011040009A patent/CN1231002C/zh not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6084865A (en) * | 1995-07-12 | 2000-07-04 | Ericsson Inc. | Dual mode satellite/cellular terminal |
US5844907A (en) * | 1995-11-28 | 1998-12-01 | Mitsubishi Denki Kabushiki Kaisha | Synchronization determining circuit, demodulator and communication system |
EP0905941A1 (en) | 1997-02-13 | 1999-03-31 | Ntt Mobile Communications Network Inc. | Frame synchronizing circuit |
US5991330A (en) | 1997-06-27 | 1999-11-23 | Telefonaktiebolaget L M Ericsson (Pub1) | Mobile Station synchronization within a spread spectrum communication systems |
US6118825A (en) * | 1997-08-11 | 2000-09-12 | Sony Corporation | Digital data transmission device and method, digital data demodulation device and method, and transmission medium |
US6549544B1 (en) * | 1999-11-10 | 2003-04-15 | Ibiquity Digital Corporation | Method and apparatus for transmission and reception of FM in-band on-channel digital audio broadcasting |
US6618367B1 (en) * | 1999-12-16 | 2003-09-09 | Agere Systems Inc. | Transmission frame structure for a satellite digital audio radio system |
Non-Patent Citations (1)
Title |
---|
3rd Generation Partnership Project (3GPP) Technical Specification Group Radio Access Network Multiplexing and Channel Coding (FDD) (3G TS 25.212 version 3.3.0) (XP-002149187). |
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US10320587B2 (en) | 2001-05-21 | 2019-06-11 | Sony Corporation | Channel estimation for wireless systems without matrix inversion |
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US10666463B2 (en) | 2001-05-21 | 2020-05-26 | Sony Corporation | Channel estimation for wireless systems without matrix inversion |
US7443919B2 (en) | 2001-05-21 | 2008-10-28 | At&T Corp. | Channel estimation for wireless systems with multiple transmit antennas |
US8472553B2 (en) | 2001-05-21 | 2013-06-25 | At&T Intellectual Property Ii, L.P. | Channel estimation for wireless systems without matrix inversion |
US20090122902A1 (en) * | 2001-05-21 | 2009-05-14 | Ye Li | Channel estimation for wireless systems with multiple transit antennas |
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US7245601B2 (en) * | 2002-08-13 | 2007-07-17 | Alcatel | Method and devices for operating a radio-based telecommunications system |
US20040032841A1 (en) * | 2002-08-13 | 2004-02-19 | Alcatel | Method and devices for operating a radio-based telecommunications system |
US20090086700A1 (en) * | 2003-10-02 | 2009-04-02 | Qualcomm Incorporated | Systems and methods for communicating control data using multiple slot formats |
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US7599327B2 (en) * | 2004-06-24 | 2009-10-06 | Motorola, Inc. | Method and apparatus for accessing a wireless communication system |
US20050286465A1 (en) * | 2004-06-24 | 2005-12-29 | Xiangyang Zhuang | Method and apparatus for accessing a wireless communication system |
US7564829B2 (en) * | 2004-06-25 | 2009-07-21 | Lg Electronics, Inc. | Allocation of radio resource in orthogonal frequency division multiplexing system |
US20050286408A1 (en) * | 2004-06-25 | 2005-12-29 | Lg Electronics Inc. | Allocation of radio resource in orthogonal frequency division multiplexing system |
US7773701B2 (en) * | 2004-07-01 | 2010-08-10 | Moher Michael L | Systems and methods for rapid signal detection and identification |
US20080123763A1 (en) * | 2004-07-01 | 2008-05-29 | Zarbana Digital Fund Llc | Systems and methods for rapid signal detection and identification |
CN1960226B (zh) * | 2005-10-31 | 2011-08-31 | Lg电子株式会社 | 在移动通信系统中执行初始同步和帧同步的装置及其方法 |
US9246646B2 (en) | 2010-10-01 | 2016-01-26 | Interdigital Patent Holdings, Inc. | Method and apparatus for transmitting pilot on multiple antennas |
US10341992B2 (en) | 2010-10-01 | 2019-07-02 | Interdigital Patent Holdings, Inc. | Method and apparatus for transmitting pilot on multiple antennas |
Also Published As
Publication number | Publication date |
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US20010021236A1 (en) | 2001-09-13 |
CN1309485A (zh) | 2001-08-22 |
JP3479513B2 (ja) | 2003-12-15 |
EP1126637A2 (en) | 2001-08-22 |
CN1231002C (zh) | 2005-12-07 |
EP1126637A3 (en) | 2003-09-03 |
EP1126637B1 (en) | 2011-05-18 |
ATE510368T1 (de) | 2011-06-15 |
EP1126637B8 (en) | 2012-02-08 |
JP2001268060A (ja) | 2001-09-28 |
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